Sorry, Iowa is heading to the NIT. RPI wise, the Hawkeyes are (today) 79th in the country. If (and it's a big if) the Hawkeyes make it to the Big Ten Tourney final, their record and RPI might be such that they would merit consideration. That would likely give them at least 20 wins, but two of them would likely be from beating Penn State and Northwestern which won't help your RPI much.
If all the conference tourneys go according to Hoyle, the "bubble" should be right around 47 or 48. Getting the Hawkeyes to climb 30 spots in the final six games will be a major accomplishment.